<template>
	<div class="login">
		<el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
			<h3 class="title">{{ title }}</h3>
			<el-form-item prop="username">
				<el-input
					v-model="loginForm.username"
					type="text"
					size="large"
					auto-complete="off"
					placeholder="账号"
				>
					<template #prefix>
						<svg-icon icon-class="user" class="el-input__icon input-icon"/>
					</template>
				</el-input>
			</el-form-item>
			<el-form-item prop="password">
				<el-input
					v-model="loginForm.password"
					type="password"
					size="large"
					auto-complete="off"
					placeholder="密码"
					@keyup.enter="handleLogin"
				>
					<template #prefix>
						<svg-icon icon-class="password" class="el-input__icon input-icon"/>
					</template>
				</el-input>
			</el-form-item>
			<el-form-item prop="code" v-if="captchaEnabled">
				<el-input
					v-model="loginForm.code"
					size="large"
					auto-complete="off"
					placeholder="验证码"
					style="width: 63%"
					@keyup.enter="handleLogin"
				>
					<template #prefix>
						<svg-icon icon-class="validCode" class="el-input__icon input-icon"/>
					</template>
				</el-input>
				<div class="login-code">
					<img :src="codeUrl" @click="getCode" class="login-code-img"/>
				</div>
			</el-form-item>
			<el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
			<el-form-item style="width:100%;">
				<el-button
					:loading="loading"
					size="large"
					type="primary"
					style="width:100%;"
					@click.prevent="handleLogin"
				>
					<span v-if="!loading">登 录</span>
					<span v-else>登 录 中...</span>
				</el-button>
				<div style="float: right;" v-if="register">
					<router-link class="link-type" :to="'/register'">立即注册</router-link>
				</div>
			</el-form-item>
		</el-form>
		<!--  底部  -->
		<div class="el-login-footer">
			<span>Copyright &copy; {{ new Date().getFullYear() }} All Rights Reserved.</span>
		</div>
	</div>
</template>

<script setup>
import {getCodeImg} from "@/api/login";
import Cookies from "js-cookie";
import {encrypt, decrypt} from "@/utils/jsencrypt";
import useUserStore from '@/store/modules/user'

const title = import.meta.env.VITE_APP_TITLE;
const userStore = useUserStore();
const route = useRoute();
const router = useRouter();
const {proxy} = getCurrentInstance();

const loginForm = ref({
	username: "admin",
	password: "admin123",
	rememberMe: false,
	code: "",
	uuid: ""
});

const loginRules = {
	username: [{required: true, trigger: "blur", message: "请输入您的账号"}],
	password: [{required: true, trigger: "blur", message: "请输入您的密码"}],
	code: [{required: true, trigger: "change", message: "请输入验证码"}]
};

const codeUrl = ref("");
const loading = ref(false);
// 验证码开关
const captchaEnabled = ref(true);
// 注册开关
const register = ref(false);
const redirect = ref(undefined);

watch(route, (newRoute) => {
	redirect.value = newRoute.query && newRoute.query.redirect;
}, {immediate: true});

function handleLogin() {
	proxy.$refs.loginRef.validate(valid => {
		if (valid) {
			loading.value = true;
			// 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
			if (loginForm.value.rememberMe) {
				Cookies.set("username", loginForm.value.username, {expires: 30});
				Cookies.set("password", encrypt(loginForm.value.password), {expires: 30});
				Cookies.set("rememberMe", loginForm.value.rememberMe, {expires: 30});
			} else {
				// 否则移除
				Cookies.remove("username");
				Cookies.remove("password");
				Cookies.remove("rememberMe");
			}
			// 调用action的登录方法
			userStore.login(loginForm.value).then(() => {
				const query = route.query;
				const otherQueryParams = Object.keys(query).reduce((acc, cur) => {
					if (cur !== "redirect") {
						acc[cur] = query[cur];
					}
					return acc;
				}, {});
				router.push({path: redirect.value || "/", query: otherQueryParams});
			}).catch(() => {
				loading.value = false;
				// 重新获取验证码
				if (captchaEnabled.value) {
					getCode();
				}
			});
		}
	});
}

function getCode() {
	getCodeImg().then(res => {
		captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled;
		if (captchaEnabled.value) {
			codeUrl.value = "data:image/gif;base64," + res.img;
			loginForm.value.uuid = res.uuid;
		}
	});
}

function getCookie() {
	const username = Cookies.get("username");
	const password = Cookies.get("password");
	const rememberMe = Cookies.get("rememberMe");
	loginForm.value = {
		username: username === undefined ? loginForm.value.username : username,
		password: password === undefined ? loginForm.value.password : decrypt(password),
		rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
	};
}

getCode();
getCookie();
</script>

<style lang='scss' scoped>
.login {
	display: flex;
	justify-content: center;
	align-items: center;
	height: 100%;
	background-image: url("../assets/images/login-background.png");
	background-size: cover;
}

.title {
	margin: 0px auto 30px auto;
	text-align: center;
	color: #707070;
}

.login-form {
	border-radius: 6px;
	background: #ffffff;
	width: 400px;
	padding: 25px 25px 5px 25px;

	.el-input {
		height: 40px;

		input {
			height: 40px;
		}
	}

	.input-icon {
		height: 39px;
		width: 14px;
		margin-left: 0px;
	}
}

.login-tip {
	font-size: 13px;
	text-align: center;
	color: #bfbfbf;
}

.login-code {
	width: 33%;
	height: 40px;
	float: right;

	img {
		cursor: pointer;
		vertical-align: middle;
	}
}

.el-login-footer {
	height: 40px;
	line-height: 40px;
	position: fixed;
	bottom: 0;
	width: 100%;
	text-align: center;
	color: #fff;
	font-family: Arial;
	font-size: 12px;
	letter-spacing: 1px;
}

.login-code-img {
	height: 40px;
	padding-left: 12px;
}
</style>
